How to configure fail2ban file?

I installed fail2ban, but When I enter fail2ban-client status in the Linux terminal, I get the following warnings:

fail2ban.configreader : ERROR Found no accessible config files for 'filter.d/murmur' under /etc/fail2ban
fail2ban.configreader : ERROR  No section: 'Definition'
fail2ban.configreader : ERROR  No section: 'Definition'
fail2ban.configreader : ERROR  No section: 'Definition'
fail2ban.configreader : ERROR  No section: 'Definition'
fail2ban.configreader : ERROR  No section: 'Definition'
fail2ban              :ERROR Failed to access socket path: /var/run/fail2ban/fail2ban.sock. Is fail2ban running?

By the way, I know there is a problem with the configuration, but I do not know how to configure it